Selenium and Jenkins Integration on CentOS

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　　1. Environment Required
　　CentOS Linux release 6.0 (Final) (cat /etc/redhat-release)
　　JDK: jdk1.6.0_27 (/opt/)
　　ApacheTomcat: apache-tomcat-6.0.33 (/opt/)
　　1.1 Extract JDK and Apache Tomcat (tar xvf *.tar.gz)
　　1.2 Set environment variables like below:
　　1.2.1 nano ~/.profile or /etc/.profile (nano is better than vi, we can install it using yum install nano in CentOS)
　　JAVA_HOME=/opt/jdk1.6.0_27
CLASSPATH=.:$JAVA_HOME/lib/tool.jar
ANT_HOME=/opt/apache-ant-1.8.2
DISPLAY=:1.0
PATH=:$ANT_HOME/bin:$JAVA_HOME/bin:$PATH
export LANG="en_US.utf8" JAVA_HOME CLASSPATH PATH
　　1.2.2 source ~/.profile
　　1.2.3 verify if set successful using echo $JAVA_HOME
　　1.3 Start Apache
　　cd /opt/apache-tomcat-6.0.33/bin
　　sh startup.sh or ./startup.sh
　　1.4 Verify if Apache work well
　　http://host:8080
　　If it cannot be accessed, it may be relevant with firewall, just close firewall using service iptables stop or add a rule to open 8080
　　2. Install Jenkins
　　There are 2 ways to install it, one is using rpm(refer to http://jenkins-ci.org/  CentOS), another is using jenkins.war
　　2.1 For first method:http://pkg.jenkins-ci.org/redhat/ this will installed jenkins in /var/lib/jenkins and the service will in /etc/init.d/jenkins
　　When starting jenkins, there is an error saying /usr/bin/java: No such file or directory
　　The solution is to make a soft link using ln -s $JAVA_HOME/bin/java /usr/bin/java
　　Use this method, there is some issue when integating with Selenium(Firefox Profile cannot be accessed well and if put profile in /tmp/, selenium will hang on Launching firefox....).
　　2.2 For second method: Download jenkins.war, and copy it to /opt/apache-tomcat-6.0.33/webapps , and restart apache
　　Then we can access jenkins using http://host:8080/jenkins
　　3. Install Firefox and Xvfb
　　yum install firefox
　　yum install Xvfb
　　When start Xvfb using /usr/bin/Xvfb :1 -ac -screen 0 1024x768x8 there is an issue below:
　　(EE) AIGLX error: dlopen of /usr/lib64/dri/swrast_dri.so failed (/usr/lib64/dri/swrast_dri.so: cannot open shared object file: No such file or directory)
(EE) GLX: could not load software renderer
　　The solution is to install mesa-dri-drivers-7.7-2.el6.x86_64.rpm
　　4. Set environment variable DISPLAY
　　DISPLAY=:1.0 (same with Xvfb starting setting)
　　5. Install font libs
　　If we start an app like firefox, there will an error like (firefox:3087): Pango-WARNING **: failed to choose a font, expect ugly output.
　　The solution is to install font libs using yum install xorg-x11-font*
　　6. Install Selenium plugins
　　Jenkins-Manage Jenkins-Available-Check Selenium plugins: Hudson Seleniumhq plugin and  Selenium HTML report to install
　　7. Download selenium server jar, and put it in /opt/
　　8. Configure selenium server path
　　Jenkins-Manage Jenkins-Configure System

　　9. Configure a job


　　Note: Firefox need a profile template to launch, the template can be copied from other machine.
　　How to create a profile template? Just close firefox browser, and type firefox -ProfileManager in terminal, then the dialog pops up, and we can create it here.